US 9,810,359 B2
Pipe coupling
Wayne Spears, Sylmar, CA (US); Robert Wayne Spears, II, Sylmar, CA (US); and David E. Littleton, Santa Clara, CA (US)
Assigned to Spears Manufacturing Co., Sylmar, CA (US)
Filed by SPEARS MANUFACTURING CO., Sylmar, CA (US)
Filed on Oct. 6, 2015, as Appl. No. 14/876,791.
Claims priority of provisional application 62/060,411, filed on Oct. 6, 2014.
Prior Publication US 2016/0097477 A1, Apr. 7, 2016
Int. Cl. F16L 37/00 (2006.01); F16L 37/091 (2006.01)
CPC F16L 37/091 (2013.01) 20 Claims
OG exemplary drawing
 
1. A pipe coupling comprising:
a) a cylindrical body for accepting and retaining ends of a pair of spaced apart pipe sections, the cylindrical body comprising two opposed ends, the two opposed ends each comprising an interior surface;
b) an end connector attached to each of the opposed ends of the cylindrical body, each end connector comprising an axially facing interior surface and a radially facing interior surface, the axially facing interior surface having a groove formed therein;
c) a gasket disposed within an indentation defined within the interior surface of each of the opposed ends of the cylindrical body;
d) a gasket retaining ring disposed between each end connector and the corresponding gasket, each gasket retaining ring having a shoulder disposed within the groove of the corresponding end connector; and
e) a gripper washer disposed between each gasket retaining ring and end connector, each gripper washer comprising a concentric interior periphery composed of a plurality of gripping fingers;
wherein the shoulder of each of the gasket retaining rings prevents the corresponding gripper washer from contacting the radially facing interior surface of the corresponding end connector.